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Question

Difficulty: MediumDepressive Disorders

A 32-year-old woman presents to the outpatient clinic with a 2-month history of severely depressed mood. She reports sleeping up to 14 hours a day, an increased appetite with a 5-kg (11-lb) weight gain, and a frequent sensation that her arms and legs are "made of lead." She states that she briefly feels better when her friends visit, but her low mood quickly returns. She has no prior psychiatric history and has never been treated for depression. She tearfully requests an antidepressant medication so she can return to her job as an accountant. Her vital signs and physical examination are unremarkable. Laboratory studies reveal a thyroid-stimulating hormone (TSH) level of 1.5 mU/L (normal: 0.4-4.0 mU/L) and a free T4 at the lower limit of normal. A urine toxicology screen is negative. The physician diagnoses a major depressive episode with atypical features and considers initiating pharmacotherapy. Which of the following is the most appropriate next step in management?

  1. Elicit a history of periods of elevated mood, impulsivity, and decreased need for sleepAnswer
  2. B
    Initiate sertraline monotherapy and plan to discontinue the medication 2 weeks after symptom remission
  3. C
    Initiate fluoxetine and phenelzine concurrently to aggressively target her atypical depressive features
  4. D
    Delay pharmacotherapy and recommend psychotherapy, as symptom duration must exceed 6 months for a diagnosis
  5. E
    Initiate levothyroxine therapy, as her atypical symptoms are caused by primary hypothyroidism

Answer

The correct answer is to elicit a history of periods of elevated mood, impulsivity, and decreased need for sleep.
The correct next step is to screen the patient for a lifetime history of manic or hypomanic episodes. While this patient is currently experiencing a major depressive episode, atypical features (such as hypersomnia, weight gain, leaden paralysis, and mood reactivity) are particularly common in the depressive phase of bipolar disorder. Universal screening for bipolar disorder is required before initiating any antidepressant monotherapy. Failing to do so can lead to the inappropriate administration of an antidepressant (e.g., an SSRI), which carries a significant risk of inducing a manic switch or rapid cycling in patients with underlying bipolar disorder.

Step-by-Step Solution

1
Identify the current clinical syndrome.
The patient meets the criteria for a major depressive episode with atypical features (hypersomnia, hyperphagia, leaden paralysis, mood reactivity).
Recognizing the symptom cluster is required to establish the baseline diagnosis.
2
Determine the necessary safety and diagnostic checks prior to initiating antidepressant treatment.
The physician must screen for a history of mania or hypomania.
Antidepressant monotherapy can precipitate a manic episode (manic switch) in patients with undiagnosed bipolar disorder. Atypical depressive features specifically have a high correlation with bipolar depression.
3
Evaluate the provided options against standard psychiatric management guidelines.
Screening for manic/hypomanic symptoms is the only safe and appropriate next step before writing a prescription.
All other options involve inappropriate prescribing practices, contraindicated combinations, or incorrect application of diagnostic timelines.

Key Concept

Screening for bipolar disorder before initiating antidepressant monotherapy
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Topics

Depressive Disorders

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